Maccoyoceras Miller, Dunbar & Condra, 1933

Korn, Dieter, Miao, Luyi & Bockwinkel, Jürgen, 2022, The nautiloids from the Early Carboniferous Dalle à Merocanites of Timimoun, western Algeria, European Journal of Taxonomy 789, pp. 104-129 : 107

publication ID	https://doi.org/10.5852/ejt.2022.789.1635
publication LSID	lsid:zoobank.org:pub:A475F919-D925-457E-B007-3FE2B55659A3
DOI	https://doi.org/10.5281/zenodo.6302040
persistent identifier	https://treatment.plazi.org/id/D10BF403-FFB6-1761-FE68-18E7FE76FA22
treatment provided by	Felipe
scientific name	Maccoyoceras Miller, Dunbar & Condra, 1933
status

Treatment

Genus Maccoyoceras Miller, Dunbar & Condra, 1933

Type species

Nautilus ( Discites) discors M‘Coy, 1844 ; original designation.

Diagnosis

Genus of the family Trigonoceratidae with evolute conch; whorls slightly impressed; whorl profile hexagonal or pentagonal with flattened venter and narrowly rounded umbilical margin. Ornament in the adult stage with coarse growth lines, in the preadult stage with fine spiral lines. Suture line with shallow external and lateral lobes. Siphuncle small with subcentral position (after Kummel 1964; emended).

Included species

Nautilus ( Trematodiscus) discoidalis Winchell, 1862 , Michigan; Nautilus ( Discites) discors M‘Coy, 1844 , Ireland; Nautilus Leveilleanus de Koninck, 1844 View in CoL , Belgium; Maccoyoceras pentagonum sp. nov., Algeria; Discitoceras wrightii Foord, 1900, Ireland.

Stratigraphic range

Late Tournaisian to Viséan.